package main

import "fmt"

func main() {
	ch1 := make(chan int)
	ch2 := make(chan int, 0)
	var ch3 = make(chan int, 3)

	fmt.Printf("%p\n", ch1)
	fmt.Printf("%p\n", ch2)
	fmt.Printf("%p\n", ch3)

	close(ch1)
	close(ch2)
	close(ch3)

}
